(i) By the mid-nineteenth century, Richard M. Hoe of New York had perfected the power-driven cylindrical press. This was capable of printing 8,000 sheets per hour. This press was particularly useful for printing newspapers. (ii) In the late nineteenth century, the offset press was developed which could print up to six colours at a time. (iii) From the turn of the twentieth century, electrically operated presses accelerated printing operations.